package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.UUID;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        //使用MD5得到秘钥
        String pass = DigestUtils.md5DigestAsHex((employeeLoginDTO.getPassword() + employee.getSalt()).getBytes());
        if (!employee.getPassword().equals(pass)) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增用户
     *
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //将数据库实体类信息补全
        BeanUtils.copyProperties(employeeDTO,employee);
        //账号状态、创建时间、创建人、修改时间、修改人
        //从线程变量获得用户信息
        Long id = BaseContext.getCurrentId();
        employee.setStatus(StatusConstant.ENABLE);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(id);
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setCreateUser(id);
        //密码用md5加密
        UUID uuid = UUID.randomUUID();
        String pass = DigestUtils.md5DigestAsHex(("123456" + uuid.toString()).getBytes());
        employee.setPassword(pass);
        employee.setSalt(uuid.toString());

        this.employeeMapper.addEmployee(employee);
    }

    /**
     * 分页查询
     *
     * @param employeeDTO
     * @return
     */
    @Override
    public PageResult pageQueryDto(EmployeePageQueryDTO employeeDTO) {
        //开始分页查询
        PageHelper.startPage(employeeDTO.getPage(), employeeDTO.getPageSize());

        Page<Employee> page = this.employeeMapper.pageQuery(employeeDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 禁用用户
     *
     * @param status
     * @param id
     */
    @Override
    public void status(Integer status, long id) {
        Employee employee = Employee.builder().id(id).status(status).build();
        this.employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     *
     * @param id
     * @return
     */
    @Override
    public Employee getById(long id) {
        return employeeMapper.getbyId(id);
    }

    /**
     * 修改员工
     *
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //获取操作人
        Long userId = BaseContext.getCurrentId();
        employee.setUpdateUser(userId);
//        employee.setUpdateTime(LocalDateTime.now());
        //更新操作时间
        this.employeeMapper.update(employee);
    }

}
